S 600 Sedan (140.057) V12-6.0L (120.982) (1996)
Automatic transmission
When a drive position is engaged, a lower engine speed is controlled in order to reduce the creeping tendency of the vehicle. The information "Drive
position engaged/not engaged" is transmitted by the ETC control module (N15/3) over the CAN databus to the ME-SFI control module.
Ignition angle in idle speed range
To assist the idle speed control, the ignition angle can be retarded by as much as 36° crank angle or advanced by as much as 20° crank angle from the
calculated specified value.
AC compressor
In order to avoid engine speed dropping in the idle speed range when the AC compressor is engaged, the AC pushbutton control module or automatic air
conditioning pushbutton control module (N22) supplies a signal to the ME-SFI control module (as of approx. 6/96 over CAN) and the opening
cross-section of the throttle valve is enlarged.
Note
The control in the idle speed range by altering the ignition angle reacts more rapidly than altering the position of the throttle valve.
Note: Idle speed can be influenced with STAR DIAGNOSIS/HHT.